<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>参考链接：https://codepen.io/chrisbautista/pen/NWXjqLN</title>
</head>
<style>
    @import url("https://fonts.googleapis.com/css2?family=Roboto&display=swap");
    @import url("https://fonts.googleapis.com/icon?family=Material+Icons+Outlined");

    :root {
        --accent-color: #1fa8f5;
        --accent-color-fg: #fefefe;
        --backdrop-color: #89d4fe;
        --app-content-background-color: #c0d8ec;
        --inset-shadow: rgba(7, 43, 74, 0.3);
        --outset-shadow: rgba(223, 240, 255, 0.25);
        --clay-box-shadow: rgba(7, 43, 74, 0.3);
        --clay-background-color: #c0d8ec;
        --clay-fg-color: #444;
    }

    body {
        background-color: var(--backdrop-color);
        font-size: 10px;
        font-family: "Roboto", sans-serif;
    }

    .flex-center {
        display: flex;
        justify-content: space-around;
        align-items: center;
    }

    .container {
        padding: 1rem 1rem 1.5rem;
    }

    .stage {
        max-width: 400px;
        width: 400px;
        margin: 0 auto;
    }

    .home.active {
        color: var(--accent-color);
    }

    .home-style {
        --app-content-background-color: #c0d8ec;
    }

    .products.active {
        --outset-shadow: rgba(247, 167, 103, 0.45);
        --inset-shadow: rgba(149, 62, 8, 0.45);
        --clay-box-shadow: rgba(211, 69, 20, 0.4);
        --clay-background-color: #d34514;
        --clay-fg-color: #f1f2f3;
        color: #690c0c;
    }

    .products-style {
        --app-content-background-color: #d36e5a;
    }

    .services.active {
        --outset-shadow: rgba(255, 159, 40, 0.45);
        --inset-shadow: rgba(88, 54, 13, 0.45);
        --clay-box-shadow: rgba(88, 54, 13, 0.4);
        --clay-background-color: #ed9426;
        --clay-fg-color: #f1f2f3;
        color: #cf5c0f;
    }

    .services-style {
        --app-content-background-color: #ed9426;
    }

    .about.active {
        --outset-shadow: rgba(93, 255, 85, 0.45);
        --inset-shadow: rgba(28, 78, 26, 0.45);
        --clay-box-shadow: rgba(28, 78, 26, 0.4);
        --clay-background-color: #4dd146;
        --clay-fg-color: #f1f2f3;
        color: #4dd146;
    }

    .about-style {
        --app-content-background-color: #4dd146;
    }

    .help.active {
        --outset-shadow: rgba(230, 230, 230, 0.45);
        --inset-shadow: rgba(81, 81, 81, 0.45);
        --clay-box-shadow: rgba(81, 81, 81, 0.4);
        --clay-background-color: #a3a3a3;
        --clay-fg-color: #f1f2f3;
        color: #783896;
    }

    .help-style {
        --app-content-background-color: #a3a3a3;
    }

    .tabbar {
        background-color: var(--app-content-background-color);
        border-bottom-left-radius: 1rem;
        border-bottom-right-radius: 1rem;
        box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
        height: 120px;
        display: flex;
        flex-direction: column;
        box-sizing: content-box;
        position: relative;
        overflow: hidden;
        transition: background-color 0.4s;
    }

    .tabbar ul,
    .tabbar li {
        list-style-type: none;
        margin: 0;
        padding: 0;
    }

    .tabbar ul {
        position: absolute;
        bottom: 0;
        width: 100%;
        background-color: #f9f8fa;
        align-self: flex-end;
        justify-content: center;
        height: 50px;
    }

    .tabbar li {
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 1rem;
        margin-right: 5px;
        transition: all 0.4s;
        background-color: #f9f8fa;
        width: 60px;
        height: 60px;
        position: relative;
        color: #888;
        cursor: pointer;
    }

    .tabbar li:last-child {
        margin-right: 0;
    }

    .tab-style1 ul {
        justify-content: center;
    }

    .tab-style1 li {
        display: flex;
        justify-content: center;
        align-items: center;
        top: 1px;
        left: 0;
        width: 60px;
        height: 50px;
        transition: top 0.2s ease-out, width 0.4s, border-radius 0.4s, box-shadow 0.4s;
    }

    .tab-style1 li.follow {
        position: absolute;
        border-radius: 100%;
        content: " ";
        width: 60px;
        height: 60px;
        border: 10px solid var(--app-content-background-color);
        background-color: var(--app-content-background-color);
        top: -3rem;
        transition: left 0.4s ease-in, background-color 0.4s, border-color 0.4s;
    }

    .tab-style1 li.follow:before,
    .tab-style1 li.follow:after {
        content: " ";
        position: absolute;
        top: 27px;
        right: -27px;
        border-top: 11px solid var(--app-content-background-color);
        background-color: #f9f8fa;
        width: 20px;
        height: 20px;
        box-sizing: border-box;
        transition: border-color 0.4s;
    }

    .tab-style1 li.follow::after {
        border-top-left-radius: 100%;
    }

    .tab-style1 li.follow:before {
        left: -27px;
        right: unset;
        border-top-right-radius: 100%;
    }

    .tab-style1 li:nth-child(1).active~.follow {
        left: 12px;
    }

    .tab-style1 li:nth-child(2).active~.follow {
        left: 75px;
    }

    .tab-style1 li:nth-child(3).active~.follow {
        left: 140px;
    }

    .tab-style1 li:nth-child(4).active~.follow {
        left: 205px;
    }

    .tab-style1 li:nth-child(5).active~.follow {
        left: 270px;
    }

    .tab-style1 .active {
        z-index: 100;
        width: 60px;
        height: 60px;
        top: -2rem;
        border-radius: 100%;
        box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 8px 16px 0 rgba(0, 0, 0, 0.2);
    }

    .tab-style2 ul {
        justify-content: center;
    }

    .tab-style2 li {
        border-top-left-radius: 100%;
        border-top-right-radius: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        top: 1px;
        left: 0;
        width: 60px;
        height: 50px;
    }

    .tab-style2 .active {
        width: 60px;
        height: 60px;
        top: -1rem;
    }

    .tab-style2 .active span {
        font-size: 2rem;
    }

    .tab-style2 .active:before,
    .tab-style2 .active:after {
        position: absolute;
        content: " ";
        width: 13px;
        height: 13px;
        border-bottom: 4px solid #f9f8fa;
        top: 8px;
    }

    .tab-style2 .active:before {
        border-bottom-right-radius: 100%;
        left: -7px;
    }

    .tab-style2 .active:after {
        border-bottom-left-radius: 100%;
        right: -7px;
    }

    .tab-style3 li {
        top: -8px;
        width: 60px;
        height: 35px;
        background-color: transparent;
        padding-top: 3px;
    }

    .tab-style3 li.follow {
        position: absolute;
        top: 0;
        display: flex;
        border-top: 3px solid #333;
        width: 60px;
        height: 1px;
        transition: all 0.3s ease-out;
    }

    .tab-style3 li:nth-child(1).active~.follow {
        left: 20px;
        z-index: 20;
    }

    .tab-style3 li:nth-child(2).active~.follow {
        left: 88px;
        z-index: 20;
    }

    .tab-style3 li:nth-child(3).active~.follow {
        left: 149px;
        z-index: 20;
    }

    .tab-style3 li:nth-child(4).active~.follow {
        left: 216px;
        z-index: 20;
    }

    .tab-style3 li:nth-child(5).active~.follow {
        left: 283px;
        z-index: 20;
    }

    .tab-style4 li {
        width: 60px;
        height: 40px;
        flex-direction: column;
        overflow: hidden;
    }

    .tab-style4 li span {
        position: relative;
        top: 3px;
        transition: top 0.4s ease-out, font-size 0.2s ease-out;
        text-shadow: inset 2px 2px 4px var(--clay-box-shadow);
    }

    .tab-style4 li:after {
        width: 100%;
        height: 10px;
        text-transform: uppercase;
        text-align: center;
        font-size: 8px;
        font-weight: bold;
        position: relative;
        bottom: -30px;
        opacity: 0;
        transition: bottom 0.2s ease-out, opacity 0.4s ease-out;
    }

    .tab-style4 li.active:after {
        opacity: 1;
        bottom: 2px;
        text-shadow: inset 2px 2px 8px var(--clay-box-shadow);
    }

    .tab-style4 li:nth-child(1):after {
        content: "home";
    }

    .tab-style4 li:nth-child(2):after {
        content: "products";
    }

    .tab-style4 li:nth-child(3):after {
        content: "services";
    }

    .tab-style4 li:nth-child(4):after {
        content: "company";
    }

    .tab-style4 li:nth-child(5):after {
        content: "help";
    }

    .tab-style4 .active span {
        font-size: 1.1rem;
        top: -4px;
    }

    .tab-style5 ul {
        justify-content: center;
    }

    .tab-style5 li {
        display: flex;
        justify-content: center;
        align-items: center;
        top: 1px;
        left: 0;
        width: 60px;
        height: 50px;
        transition: top 0.4s ease-out, border-radius 0.4s ease-out, box-shadow 0.4s ease-out;
    }

    .tab-style5 .active {
        width: 60px;
        height: 60px;
        border-radius: 100%;
        top: -1rem;
        background-color: var(--clay-background-color);
        box-shadow: 1px 2px 4px 0 var(--clay-box-shadow), 2px 4px 8px 0 var(--clay-box-shadow), inset 2px 2px 8px var(--outset-shadow), inset -2px -2px 8px var(--inset-shadow);
        color: var(--clay-fg-color);
    }

    .tab-style5 .active span {
        font-size: 2rem;
    }
</style>

<body>
    <div class="container stage">

        <div class="container">
            <div class="tabbar tab-style3">
                <ul class="flex-center">
                    <li class="home active" data-where="home"><span class="material-icons-outlined">
                            home
                        </span></li>
                    <li class="products" data-where="products"><span class="material-icons-outlined">
                            shopping_bag
                        </span></li>
                    <li class="services" data-where="services"><span class="material-icons-outlined">
                            plumbing
                        </span></li>
                    <li class="about" data-where="about"><span class="material-icons-outlined">
                            business
                        </span></li>
                    <li class="help" data-where="help"><span class="material-icons-outlined">
                            help_outline
                        </span></li>
                    <li class="follow">&nbsp;</li>
                </ul>
            </div>
        </div>

        <div class="container">
            <div class="tabbar tab-style2">
                <ul class="flex-center">
                    <li class="home active" data-where="home"><span class="material-icons-outlined">
                            home
                        </span></li>
                    <li class="products" data-where="products"><span class="material-icons-outlined">
                            shopping_bag
                        </span></li>
                    <li class="services" data-where="services"><span class="material-icons-outlined">
                            plumbing
                        </span></li>
                    <li class="about" data-where="about"><span class="material-icons-outlined">
                            business
                        </span></li>
                    <li class="help" data-where="help"><span class="material-icons-outlined">
                            help_outline
                        </span></li>
                </ul>
            </div>
        </div>

        <div class="container">
            <div class="tabbar tab-style1">
                <ul class="flex-center">
                    <li class="home active" data-where="home"><span class="material-icons-outlined">
                            home
                        </span></li>
                    <li class="products" data-where="products"><span class="material-icons-outlined">
                            shopping_bag
                        </span></li>
                    <li class="services" data-where="services"><span class="material-icons-outlined">
                            plumbing
                        </span></li>
                    <li class="about" data-where="about"><span class="material-icons-outlined">
                            business
                        </span></li>
                    <li class="help" data-where="help"><span class="material-icons-outlined">
                            help_outline
                        </span></li>
                    <li class="follow">&nbsp;</li>
                </ul>
            </div>
        </div>

        <div class="container">
            <div class="tabbar tab-style4">
                <ul class="flex-center">
                    <li class="home active" data-where="home"><span class="material-icons-outlined">
                            home
                        </span></li>
                    <li class="products" data-where="products"><span class="material-icons-outlined">
                            shopping_bag
                        </span></li>
                    <li class="services" data-where="services"><span class="material-icons-outlined">
                            plumbing
                        </span></li>
                    <li class="about" data-where="about"><span class="material-icons-outlined">
                            business
                        </span></li>
                    <li class="help" data-where="help"><span class="material-icons-outlined">
                            help_outline
                        </span></li>
                </ul>
            </div>
        </div>

        <div class="container">
            <div class="tabbar tab-style5">
                <ul class="flex-center">
                    <li class="home active" data-where="home"><span class="material-icons-outlined">
                            home
                        </span></li>
                    <li class="products" data-where="products"><span class="material-icons-outlined">
                            shopping_bag
                        </span></li>
                    <li class="services" data-where="services"><span class="material-icons-outlined">
                            plumbing
                        </span></li>
                    <li class="about" data-where="about"><span class="material-icons-outlined">
                            business
                        </span></li>
                    <li class="help" data-where="help"><span class="material-icons-outlined">
                            help_outline
                        </span></li>
                </ul>
            </div>
        </div>
    </div>
</body>
<script>
    const uls = document.querySelectorAll("ul");

    uls.forEach((ul) => {
        const resetClass = ul.parentNode.getAttribute("class");
        const lis = ul.querySelectorAll("li");

        lis.forEach((li) => {
            li.addEventListener("click", (e) => {
                e.preventDefault();
                e.stopPropagation();
                const target = e.currentTarget;

                if (
                    target.classList.contains("active") ||
                    target.classList.contains("follow")
                ) {
                    return;
                }

                ul.parentNode.setAttribute(
                    "class",
                    `${resetClass} ${target.getAttribute("data-where")}-style`
                );

                lis.forEach((item) => clearClass(item, "active"));

                setClass(target, "active");
            });
        });
    });

    function clearClass(node, className) {
        node.classList.remove(className);
    }

    function setClass(node, className) {
        node.classList.add(className);
    }

</script>

</html>